| // Copyright (C) 2004 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 2, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| #include <fstream> |
| #include <sstream> |
| #include <testsuite_performance.h> |
| |
| void test_extraction(int p = 6) |
| { |
| using namespace std; |
| using namespace __gnu_test; |
| |
| const char* filename = "tmp_perf_float.txt"; |
| const int iterations = 10000000; |
| |
| ostringstream oss; |
| oss << "precision " << p; |
| |
| // Construct data. |
| { |
| ofstream out(filename); |
| out.precision(p); |
| for (int i = 0; i < iterations; ++i) |
| { |
| float f = i * 3.14159265358979323846; |
| out << f << '\n'; |
| } |
| } |
| |
| { |
| time_counter time; |
| resource_counter resource; |
| |
| ifstream in(filename); |
| in.precision(p); |
| float f; |
| start_counters(time, resource); |
| for (int j, i = 0; i < iterations; ++i) |
| in >> f; |
| stop_counters(time, resource); |
| report_performance(__FILE__, oss.str(), time, resource); |
| } |
| |
| unlink(filename); |
| }; |
| |
| int main() |
| { |
| test_extraction(6); |
| test_extraction(12); |
| return 0; |
| } |